mills



3 Sheets Sheet 1.

(No Model.)

0. MILLS. MACHINE FOR GRINDING cums.

No. 547,275. Patented Oct; 1, 1895.

Ink/ENTER ANDREW EGBNMM FHUTO-LIYNO wASmNGTOILDC 3 Sheets-Sheet 2Patented Oct. 1, 1895.

C. MILLS.

(Nd Model.)

MACHINE FOR GRINDING CARDS. No. 547,275.

Ink/ENTEIFK aha.

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ANDREW B GRANAM PHO'YO-LITMOWF'QHINGTONYDC \A/l-rmzssas Wu. %LM 5 ,2 WM.

-- (N0 Mode1 3Sheets-Sheet3.'

v C. MILL MAGHINE FOR GRIND CARDS.

Patented Oct. 1, 1895.

INVENTEIR 41M \A/H-NEEEEE lJNiTnn STATES PATENT rricn,

CHARLES MILLS, OF NEWTON, MASSACHUSETTS, ASSIGNOR TO THE PETTEE MACHINEWORKS, OF SAME PLACE.

MACHINE FOR GRINDING CARDS.

SPECIFICATION forming part of Letters Patent No. 547,275, dated October1, 1895.

Serial No. 518,220. (No model.)

To all whom it may concern.-

Be it known that 1, CHARLES MILLS, a subject of Victoria, Queen of GreatBritain, now residing in Newton Upper Falls, in the county of Middlesexand State of Massachusetts, have invented a new and useful Improvementin Machines for Grinding Cards, of which the following is a full, clear,and exact description, reference being had to the accompanyro ingdrawings, forming a part of this speciiication, in explaining itsnature.

The invention relates to devices for grinding the flats of a rotarycarding-engine, and it comprises a grinding-roll conveniently 1ocated inrelation to the track in which the flats move, a stationary guide uponeach side of the roll, and a traveling guide upon each side of the rollused in connection with the stationary guide, which guides are adaptedto be held in the path of movement of the flats at each end thereof, andare adapted when each flat is brought into contact with them to be movedwith the flat and guide the surface of the flat in relation to thegrinding-roll to grind its wire clothing, as may be desired, accordingto the shape of the stationary guides and of the guiding-surfaces of thesliding guides.

It further relates to means for holding each flat in contact with theguides during the grinding operation; also, to means for removing eachflat from the sliding guides at the end of the grinding operation, andalso to means for automatically returning the sliding guides to theiroriginal position after the grinding of one flat, in order that they mayperform a similar service for each succeeding flat as it is movedonward.

Referring'to the drawings, Figure 1 is a view in side elevation of oneside of the grinding apparatus representing a portion of thegrinding-roll, its stand, some of the flats in dotted outline, thestationary guide of that side of the mechanism in dotted outline, thesliding guide, and the other operating devices. Fig. 2 is a view,principally in rear elevation, of the devices which constitute one sideof the grindinglapparatus. Fig. 3 is a View in vertical section of thesedevices. Fig. 5o 4 is aview in elevation of these devices from withinthe machine looking outward.

A is the grinding-roll. It is rotated and reciprocated as is usual andis supported at each end over the line of travel of the flats B bystands C, bolted to the side frames of the carding-engine, one only ofwhich is shown.

D is a stationary guide projecting inward from the stand 0, (see Figs. 2and 3,) and the under surface d of which forms the guiding-surfaceagainst or upon which the sliding 6o guide E is moved. The shape of thisgu1ding-surface d and the guiding-surface e of the sliding guide Edetermines the line of presentation of the surface of the flat to bground to the grinding-roll.

It will be understood that there is a similar stationary guide andsliding guide upon the opposite side of the machine, and that each flatby its ends engages simultaneously the two sliding guides, and that thetwo sliding 7o guides and the flat then move onward together.

It is the forward edge of each flat which first comes into contact witha downwardlyextending shoulder e of each sliding guide E, and extendingbackward from the upper end of this shoulder is the bed or surface cagainst which the working surface I) of the flat is brought into contactand held during the sliding movement of the guides and the So grindingoperation.

The guide E is supported by the bracket E, in which there is a recess 6extending from its upper surface 6 downward, into which adownwardly-extending tongue 6 of the guide extends. The shoulders e ofthe guide rest upon the upper surface of this bracket, and theinwardly-extending section e projects over the end I) of the fiat andhas the shoulder e and surface 6 above referred to. The guide is movedin one direction by the fiat, and upon the release of the flat isreturned to its normal or original position to be engaged by the nextfiat in order by means of the overbalancing-weight F, its lever f,pivoted at f 5 and having a short arm f which engages the slideE at fThe flats are guided or directed in their movement toward the shoulder eof the slide E when the slide is in its backward position by riding uponthe guiding support or table G and by the surface h of thevertically-movable stud H, the said stud being held in its highestposition during the advancing and grinding movement of each flat, thedownward or inward extending section b of each flat riding upon it andresting upon it during the grinding operation; but at the end of thegrinding operation the stud is released and permitted to dropvertically, thereby releasing the fiat and permitting it to drop fromcontact with the sliding guide sufficiently to disengageits forward endI) from the shoulder 6, when the sliding guide is free to be immediatelyreturned by its overbalancing- Weight to be again engaged at the end ofits backward movement by the next fiat in order. This stud is held inits elevated position either by an overbalancing-weight H, pivoted at hand having an arm k upon which the lower end of the stud rests and whichextends sufficiently to be engaged at 72 by the lower corner 71 of theslide E, whereby the slide, when near or at the end of its forwardmovement, causes the lever to be depressed and the weight H liftedsufficiently to permit the stud to drop, or the stud may be released, asrep resented in Fig. 4, by means of a rock-lever I, pivoted to the slide2', to be carried thereby and having an arm 2" and an arm 6 the first ofwhich is adapted to be brought by the movement of the slide into contactwith the stop t' thereby lifting the end 2' of the lever 2' The backwardmovement of the slide brings the lever i into contact with the stop anddepresses the end i of the lever i It will be understood that this end iof the lever 2' is the equivalent of the stop or shoulder e of the slideE, and that when this slide is in its normal or backward position thisshoulder is enabled to catch the edge I) of the flat as it is movedforward, and this contact is maintained until the flat has been ground,when the shoulder is released by the contact of the arm 1" of the leverwith the stop i when the ground flat passes and the slide and lever arereturned to be engaged by the next fiat in order. The fiat during thegrinding operation is held against the slide by an o'verbalaneing-weightH, a vertically-movable stud H, and connecting'lever.

In operation each flat as it is rotated has its ends brought intocontact with the shoulder 8 and surface a of the sliding guides E, andupon said contact begins to move the slides along the guides D, theslides being held in contact with the guides D by the upward stress ofthe push-studs H, which, acting through the fiat, cause the flat to bearupward the guides. This onward movement of the guides E continues untilthe flat has been entirely ground, when the flat is disengaged from theslides, rides off the push-stud H, and the guides are then returnedautomatically to be engaged by the next flat in order.

Having thus fully described my invention,

I claim and desire to secure by Letters Patent of the United States- 1.In a machine of the class described, the combination with supportingstands for the grinding roll having inwardly projecting stationaryguides integral therewith, of sliding guides mounted in recesses formedin the supporting stands and vertically movable therein, the upper facesof which bear against said stationary guides, inwardly projectingsections integral with said sliding guides against the under faces ofwhich the flats are successively held, engaging shoulders for the flatsformed on the under faces of said sliding guides, a stationary table tolift the flats into proximity to the grinding roll, a vertically movablestud to lift the flats successively into contact with the grinding roll,a weighted lever to raise said stud, means for tripping said lever andallowing the stud and supported flat to fall when the grinding operationis completed, and means for returning said sliding guides to theirnormal positions when disengaged from the flats.

2. In a machine of the class described, the combination with a grindingroll and its supporting stands, of inwardly projecting guides formedintegral with said stands, sliding guides mounted in recesses in saidstands, so as to have vertical movement therein and bearing against theunder faces of said inwardly projecting guides, guiding sectionsintegral with said sliding guides and projecting inwardly beneath theends of the grinding roll, a stationary table over which the flatstravel to bring them into proximity to the grinding roll, a push studmounted centrally below said grinding roll, to lift said flatssuccessively into contact with said grinding roll, a lifting lever whichnormally holds said push stud elevated, a projecting arm on said leverwhich lies in the path of said sliding guide and is tripped thereby soas to release the push stud, means for temporarily looking together saidsliding guides and the flat to be ground, and means for returning thesliding guides to their normal positions after the grinding of eachflat.

CHARLES MILLS.

Witnesses:

F. F. RAYMOND, 2d, J. M. DOLAN.

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